I was doing some research about Proverbs 30:1-4 and had some insight I felt like might be worth sharing. I hope you find it interesting and useful!

At a face value reading of Proverbs 30:4:

Who has gone up to heaven and come down? Whose hands have gathered up the wind? Who has wrapped up the waters in a cloak? Who has established all the ends of the earth? What is his name, and what is the name of his son? Surely you know!

Any Christian would immediately understand that the Son here is Christ.

However, for fairness sake, I looked into how Jewish apologists handle these verses.

Essentially, the opening verses 1-3 are to be understood as the speaker trying to appeal to God's inscrutability and majesty by debasing himself. Afterwards, verse 4 is presented rhetorically, as the answer to the first 4 questions of verse 4 would be more less known to Agur:

God has gone up to heaven and come down

God has gathered up all the wind

God has wrapped the waters in a cloak

God has established all the ends of the earth

Therefore, the last two questions are also understood rhetorically. Agur understands:

The name of God is YHWH

The name of His son is Israel (used how "son" is used to describe Israel in Exodus 4:22, Hosea 1:10)

This is passable if Agur was speaking to the reader, indeed the OT uses rhetorical questions like this for the reader elsewhere. However, Agur is speaking to God from verse 1!

I am weary, God, but I can prevail...